天基观测条件下复杂环境对空中弱小目标可探测性的影响
投稿时间:2018-09-16  修订日期:2018-10-08  点此下载全文
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作者单位E-mail
胡建明 哈尔滨工业大学 空间光学工程研究中心 hjm1007491571@163.com 
乔凯 北京跟踪与通信技术研究所  
智喜洋 哈尔滨工业大学 空间光学工程研究中心 zhixiyang@hit.edu.cn 
张寅 南京航空航天大学  
巩晋南 哈尔滨工业大学 空间光学工程研究中心  
陈文彬 哈尔滨工业大学 空间光学工程研究中心  
基金项目:国家自然科学基金(61605035)
中文摘要:针对天基观测复杂环境下空中弱小目标远程广域探测的需求,立足于天基光学探测链路,分析太阳光照、云层、地表等复杂背景环境与目标辐射的相互作用机理,在此基础上提出影响天基目标光学特性的探测场景环境要素;然后结合目标的可探测性表征,分析在不同探测谱段情况下,不同光照、地表背景类型及云层等复杂环境要素对目标可探测性的影响规律;最后以某典型目标为例,结合现有的目标特性认知与理论建模,分析得出复杂环境要素的影响排序,并根据目标信杂比随谱段的变化特性,提出探测谱段的优选建议,为我国隐身/反隐飞行器设计、探测系统设计及信息处理算法优化提供理论依据与科学指导。
中文关键词:天基观测  复杂环境  空中弱小目标  可探测性分析  探测谱段优选
 
Influence of complex environment on the detectability of weak and small aerial target under space-based observation mode
Abstract:Aiming for remote wide-area detection of weak and small aerial target under space-based complex observation conditions, we in this paper analyze the radiation interaction mechanism between complex background environment, e.g., solar illumination, clouds and earth surface, and aerial target based on the full link of space-based optical detection. We then summarize main environmental factors that affect the target radiation characteristics. After that, combined with the detectability characterization, we investigate the influence rules of environmental factors, e.g., different illuminations, various surface background types and clouds, on the target detection performance under different detection spectrum. Finally, taking a typical target as an example, we combine existing target characteristics cognition and theoretical modeling to rank the influence order of different environmental factors, and give the detection spectral optimal selection suggestions according to the variation of signal-to-noise ratio and the variation characteristics of the spectrum. This provides theoretical basis and scientific guidance for the design of stealth/anti-stealth aircraft, space-based detection system and information processing optimization algorithm.
keywords:Space-based observation  Complex environment  Aerial weak and small targets  Detectability analysis  Detection spectral optimal selection
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